package Day01;

public class Text2 {
    //计算1/1-1/2+1/3-1/4+1/5 …… + 1/99 - 1/100 的值
    public static void main(String[] args) {
        double num = 0.0;
        int flag = 1;
        for(int i = 1; i <= 100; i++){
            num += 1.0/ (i * flag);
            flag = -flag;
        }
        System.out.println(num);
    }
}
